Related Variables
| rdinr3p |
Apnea-Hypopnea Index (NREM): (Apneas with no oxygen desaturation threshold used and with or without arousal and hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal)/ hours of NREM sleep from type I polysomnography
Calculated - Summary metric of sleep disordered breathing events during NREM sleep |
Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices | |
| rdirem3p |
Apnea-Hypopnea Index (REM): (Apneas with no oxygen desaturation threshold used and with or without arousal and hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal)/ hours of REM sleep from type I polysomnography
Calculated - Summary metric of sleep disordered breathing events during REM sleep |
Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices | |
| ai_all |
Arousal Index: number of arousals per hour of sleep from type I polysomnography
Total number of arousals per hour of sleep. Ratio of count of arousals to total sleep time in hours. |
Sleep Monitoring/Polysomnography/Arousal | |
| napdy1h | Hours of nap1 | Sleep Monitoring/Polysomnography/Evening and Morning Survey | |
| napdy2h | Hours of nap 2 | Sleep Monitoring/Polysomnography/Evening and Morning Survey | |
| napdy3h | Hours of nap 3 | Sleep Monitoring/Polysomnography/Evening and Morning Survey | |
| slpth | Hours sleep last night | Sleep Monitoring/Polysomnography/Evening and Morning Survey | |
| totawh | Hours spent awake after falling asleep for the night | Sleep Monitoring/Polysomnography/Evening and Morning Survey | |
| abdodur |
PSG Quality Assessment: hours of usable abdomen effort
Number of hours of usable signal from abdominal effort belt as assessed by scorer. |
Sleep Monitoring/Polysomnography/Signal Quality | |
| airdur |
PSG Quality Assessment: hours of usable airflow
Number of hours of usable signal from airflow sensor (thermistor) as assessed by scorer. |
Sleep Monitoring/Polysomnography/Signal Quality | |
| candur |
PSG Quality Assessment: hours of usable cannula
Number of hours of usable signal |
Sleep Monitoring/Polysomnography/Signal Quality | |
| chestdur |
PSG Quality Assessment: hours of usable chest effort
Number of hours of usable signal from thoracic effort belt as assessed by scorer. |
Sleep Monitoring/Polysomnography/Signal Quality | |
| chindur |
PSG Quality Assessment: hours of usable chin
Number of hours of usable signal from chin (EMG) lead as assessed by scorer. |
Sleep Monitoring/Polysomnography/Signal Quality | |
| eeg1dur |
PSG Quality Assessment: hours of usable EEG1
Number of hours of usable signal from EEG1 lead as assessed by scorer. |
Sleep Monitoring/Polysomnography/Signal Quality | |
| eeg2dur |
PSG Quality Assessment: hours of usable EEG2
Number of hours of usable signal from EEG2 lead as assessed by scorer. |
Sleep Monitoring/Polysomnography/Signal Quality | |
| eogldur |
PSG Quality Assessment: hours of usable EOG L
Number of hours of usable signal from left eye (EOG) lead as assessed by scorer. |
Sleep Monitoring/Polysomnography/Signal Quality | |
| eogrdur |
PSG Quality Assessment: hours of usable EOG R
Number of hours of usable signal from right eye (EOG) lead as assessed by scorer. |
Sleep Monitoring/Polysomnography/Signal Quality | |
| hrdur |
PSG Quality Assessment: hours of usable HR
Number of hours of usable signal from heart rate (ECG) leads as assessed by scorer. |
Sleep Monitoring/Polysomnography/Signal Quality | |
| legldur |
Hours of usable legL
Hours of usable L leg |
Sleep Monitoring/Polysomnography/Signal Quality | |
| legrdur |
Hours of usable legR
Hours of usable R leg |
Sleep Monitoring/Polysomnography/Signal Quality | |
| oximdur |
PSG Quality Assessment: hours of usable oximetry
Number of hours of usable signal from oximeter as assessed by scorer. |
Sleep Monitoring/Polysomnography/Signal Quality | |
| pulsedur |
PSG Quality Assessment: hours of usable pulse
Number of hours of usable signal from pulse sensor as assessed by scorer. |
Sleep Monitoring/Polysomnography/Signal Quality | |
| pwfdur |
PSG Quality Assessment: hours of usable PWF
Number of hours of usable signal |
Sleep Monitoring/Polysomnography/Signal Quality | |
| snordur | Hours of usable snore | Sleep Monitoring/Polysomnography/Signal Quality | |
| sumdur |
Hours of usable SUM
Hours of usable SUM channel |
Sleep Monitoring/Polysomnography/Signal Quality | |
| bedalcl | Do you drink 2 hours before bed | Sleep Questionnaires/Sleep Habits | |
| chgtime | Over the last month, have you experienced: your bedtime changed by two or more hours | Sleep Questionnaires/Sleep Habits | |
| dayhrs | Number of hours of sleep during the weekdays | Sleep Questionnaires/Sleep Habits | |
| dayslp_dur_hr |
Calculated sleep duration on weekdays
The difference between DAYSLP (self-reported sleep time) and DAYWAKE (self-reported wake time). The value will be missing if either DAYSLP or DAYWAKE are missing. |
Sleep Questionnaires/Sleep Habits | |
| endhrs | How many hours of sleep on weekend days | Sleep Questionnaires/Sleep Habits | |
| endslp_dur_hr |
Calculated sleep duration on weekends
The difference between ENDSLP (self-reported sleep time) and ENDWAKE (self-reported wake time). |
Sleep Questionnaires/Sleep Habits | |
| sleeptime_hr | Calculated sleep duration on all days | Sleep Questionnaires/Sleep Habits | |
| tothrslp | How many total hours of actual sleep do you get in a 24-hour period (including naps) | Sleep Questionnaires/Sleep Habits |